William Alvarez, M.D.
Gastroenterology Physician · Manitowoc, WI
William Alvarez, M.D. is a gastroenterology physician with a practice address in Manitowoc, Wisconsin, and NPI 1780792887, issued on Aug 28, 2006. Check the license (Wisconsin 46006, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- William Alvarez
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 46006 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1900 Woodland Dr, Manitowoc, WI 54220
- Phone
- (920) 320-6212
- Enumerated
- Aug 28, 2006
- Record last updated
- Jul 3, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (920) 684-5548
- Medicaid ID
- 34429800 WI
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 340 in Wisconsin → Look up another NPI →
Also registered at 1900 Woodland Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeremy Anclam, D.O.Gastroenterology Physician1841495058
- Robert Cornwell, MDInternal Medicine Physician1568448025
- Pradeep Giriyappa, M.D.Internal Medicine Physician1891803862
- Mary Govier, M.D.Internal Medicine Physician1073621199
- Michael Hiebert, MDInternal Medicine Physician1407841224
- James Hoftiezer, M.D.Gastroenterology Physician1932217924
Verify William Alvarez in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 46006Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average gastroenterology physician in 2024
136 Medicare Part D claims for 102 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Peg-3350 And Electrolytes37 claims
- Gavilyte-G34 claims
- Peg 3350-Electrolyte16 claims
- Omeprazole15 claims
- Pantoprazole Sodium11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William Alvarez among 340 gastroenterology physician records in Wisconsin
William Alvarez, M.D. is one of 340 gastroenterology physician records with a practice address in Wisconsin. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 44% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2012 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Wisconsin
There are 340 gastroenterology physician records in Wisconsin.
All 340 in Wisconsin → Every provider in Manitowoc → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jeremy Anclam, D.O.Manitowoc, WI 542201841495058
- James Hoftiezer, M.D.Manitowoc, WI 542201932217924
- Rajesh Sharma, MDTwo Rivers, WI 542411689781874
- Narayan Amarnani, MDGreen Bay, WI 543011245307321
- Kanwar Arora, MDGreen Bay, WI 543011659377828
- Swati Chaudhari, MDGreen Bay, WI 543011306918446
- Matthew Kaspar, MDGreen Bay, WI 543011275853319
- David Knuff, M.D.Green Bay, WI 543011386723773
Common questions
What is William Alvarez, M.D.'s NPI number?
William Alvarez, M.D.'s National Provider Identifier (NPI) is 1780792887, issued on Aug 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Alvarez, M.D. located?
The NPPES record lists a practice address at 1900 Woodland Dr, Manitowoc, WI, 54220. Phone: (920) 320-6212. Providers update this record themselves, so call before visiting.
How can I verify William Alvarez, M.D.'s license?
NPPES lists Wisconsin license number 46006, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Alvarez, M.D. prescribe under Medicare Part D?
In 2024, William Alvarez, M.D. had 136 Medicare Part D claims for 102 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.